A method of making a three-dimensional printed carbon-bonded composite article

A method of making a three-dimensional printed carbon bonded composite article, comprising:

• discharging from a print head a curable composition having a viscosity of at most 60,000 mPa·s at 25° C., the curable composition including:
• a) at least one aromatic, actinically curable component having an H/Catomic ratio of from 0.4 to 1.6, selected from the group consisting of (meth)acrylate oligomers, epoxy-functionalized compounds, oxetane-functionalized compounds and mixtures thereof;
• b) at least one diluent comprising at least one actinically curable monomer;
• c) at least one of a carbon reinforcement and a ceramic reinforcement;
• and
• d) a photoinitiator,
• directing cure energy from a cure enhancer mounted on the print head to the curable composition during the discharging to at least partially cure the curable composition and form a preform of the three-dimensional printed carbon-bonded composite article;
• heating the preform with a heater mounted on the print head during the discharging to pyrolize the curable composition in the preform, wherein the curable composition creates more than 18 weight % char during the heating as measured by thermogravimetric analysis after 3 hour hold at 400° C., based on a weight of the a), the b) and the d) after actinically curing.